The origin of the term is commonly associated with the Battle of Belleau Wood which took place in France during the First World War. The Germans were shocked at the ferocity of the attacking U.S. Marines (elements of the 5th and 6th Marine Regiments) and called them "Teufelhunde" which loosely translates to "Devil dog". After the battle, the French renamed it "Bois de la Brigade de Marine" ("Wood of the Marine Brigade").

1. Commonly used to address another Marine and has no real negative connotations (unless spoken sarcastically, at which point the speaker is likely to spring a rather nasty leak).

2. Used to address a Marine who's name is not known (before nametapes on the utility uniform became standard).

"Let's go, Devildogs... MOUNT UP!"

"Hey Devildog, what unit you with?"
by USMCG_Spyder December 28, 2005
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Nickname of a United States Marine. Taken from the word "teufel-hunden" that was the name given by many Germans in WW1 to attacking Marines.
Hey DevilDog, home over here.
by DevilDogWA October 16, 2005
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A nickname for a Marine, Specifically a United States Marine.
by Shackie-whackie August 29, 2017
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when a white man jizzes between a black chicks asscheeks and squishes her asscheeks together
I gave this black chick a devildog last night.
by thatguywhomakesawesomestuff March 18, 2010
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